devDefault does not work when NODE_ENV is undefined

[huseeiin]

process.env.NODE_ENV is undefined but var with devDefault throws error?

reprod

export const { PORT, isProd } = cleanEnv(Bun.env, {
  PORT: port({ devDefault: 3000 }),
});

[af]

Thanks for that PR! I hope my comment on it explains things, but essentially when NODE_ENV is missing, envalid always assumes production mode, just to be safe.

Maybe we could add some messaging in the error by default if NODE_ENV is not set at all, so this is more clear?